These 30 Facebook ads were shared by Russian trolls just days before the 2016 election. Some were so subtle, you probably didn’t realize they were ads.

Congress last week released 3,500 Facebook ads planted by Russian operatives who planned to create divisions among Americans in the year leading up to the 2016 presidential election.

To many, the ads – paid for by the Russian troll farm Internet Research Agency – weren’t easily distinguishable from the rest. Some were directly about the election, but most of the ads were subtler, created to appeal to people’s race, religion, or other aspects of their personal lives.

In October, the House Intelligence Committee Democrats shared a handful of the ads with the public. This time, it released all the ads that ran on Facebook and Instagram from June 2015 to August 2017, to give Facebook users a more comprehensive look at the ads they’ve been hearing about for almost a year.

Here are some of the ads Russians created on Facebook, specifically in the week leading up to the election:

A few ads were very clearly political. A common thread was to encourage groups of voters to cast their ballots for a third-party candidate, or simply not vote at all.